Comment 3 for bug 1403902

$ cinder extra-specs-list
+--------------------------------------+---------+------------------------------------------+
| ID | Name | extra_specs |
+--------------------------------------+---------+------------------------------------------+
| 4b8217ed-2320-4118-924a-472a01be9fe4 | lvm-4 | {u'volume_backend_name': u'lvmdriver-4'} |
| ae3b8e2b-6913-4116-88ef-59519a1ba2a9 | lvm-3 | {u'volume_backend_name': u'lvmdriver-3'} |
+--------------------------------------+---------+------------------------------------------+

$ cinder service-list
+------------------+---------------------------------+------+---------+-------+----------------------------+-----------------+
| Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+------------------+---------------------------------+------+---------+-------+----------------------------+-----------------+
| cinder-scheduler | juno-devstack-controller | nova | enabled | up | 2014-12-20T18:05:40.000000 | None |
| cinder-volume | juno-devstack-block@lvmdriver-3 | nova | enabled | up | 2014-12-20T18:06:04.000000 | None |
| cinder-volume | juno-devstack-block@lvmdriver-4 | nova | enabled | up | 2014-12-20T18:06:04.000000 | None |
+------------------+---------------------------------+------+---------+-------+----------------------------+-----------------+

when i am creating a volume without volume type(default volume host for me is juno-devstack-block@lvmdriver-3#lvmdriver-3 and default volume type for me is lvm-3) and trying migration to volume host juno-devstack-block@lvmdriver-4#lvmdriver-4,it is working for me

But when i am creating a volume with volume type lvm-3 or lvm-4 and trying to migrate to other volume host,it is failing by showing " No valid host was found. Cannot place volume xxxxx on juno-devstack-block@lvmdriver-x#lvmdriver-x" in cinder-scheduler log.